Dielectric transmission line coupler, dielectric transmission line coupling assembly and network equipment
阅读说明:本技术 介质传输线耦合器、介质传输线耦合组件及网络设备 (Dielectric transmission line coupler, dielectric transmission line coupling assembly and network equipment ) 是由 张鲁奇 唐先锋 刘余 李昆 于 2019-03-18 设计创作,主要内容包括:本发明提供一种介质传输线耦合器,包括电路板、微带线、金属连接头以及耦合部,电路板包括绝缘的表面,耦合部包括金属基座及多个谐振点的谐振体,金属基座装于表面上,并包括谐振腔及连通谐振腔和金属基座外部的通道,谐振体位于谐振腔内固定于表面上,谐振体和谐振腔均为中心对称结构且中心重合,微带线设于表面上并沿着电路板的表面由金属基座外经通道向谐振腔中心方向直线延伸至谐振腔内,微带线与谐振体间隔设置,金属连接头装于电路板上背向电路板的表面的一侧,且截止频率低于谐振腔内电磁波的工作频率;金属连接头插接介质传输线,谐振腔及谐振体将微带线传入电磁信号进行模式转换后穿过电路板及金属连接头耦合至介质传输线中。(The invention provides a dielectric transmission line coupler, which comprises a circuit board, a microstrip line, a metal connector and a coupling part, wherein the circuit board comprises an insulated surface, the coupling part comprises a metal base and a resonator with a plurality of resonance points, the metal base is arranged on the surface and comprises a resonant cavity and a channel communicated with the resonant cavity and the outside of the metal base, the resonator is positioned in the resonant cavity and fixed on the surface, the resonator and the resonant cavity are in a central symmetrical structure, the centers of the resonator and the resonant cavity are superposed, the microstrip line is arranged on the surface and linearly extends into the resonant cavity from the outside of the metal base to the central direction of the resonant cavity through the channel along the surface of the circuit board, the microstrip line and the resonator are arranged at intervals, the metal connector is arranged on one side of the circuit board, which is back to the; the metal connector is inserted in the medium transmission line, and the resonant cavity and the resonant body transmit the microstrip line into the electromagnetic signal for mode conversion and then pass through the circuit board and the metal connector to be coupled into the medium transmission line.)
1. A dielectric transmission line coupler is characterized in that the dielectric transmission line coupler comprises a circuit board, a microstrip line, a hollow metal connector and a coupling part,
the circuit board comprises an insulated surface, the coupling part comprises a metal base and a resonance body with a plurality of resonance points, the metal base is arranged on the surface, the metal base comprises a resonance cavity and a channel communicated with the outside of the resonance cavity and the metal base, the bottom wall of the resonance cavity is part of the surface of the circuit board, the resonance body is positioned in the resonance cavity and fixed on the surface, the resonance body and the resonance cavity are both in a central symmetry structure and are superposed at the center,
the microstrip line is arranged on the surface, the microstrip line linearly extends into the resonant cavity along the surface of the circuit board from the outside of the metal base to the center direction of the resonant cavity through the channel, the microstrip line and the resonant body which are positioned in the resonant cavity are arranged at intervals,
the metal connector is arranged on one side of the circuit board, which is back to the surface of the circuit board, and the cut-off frequency is lower than the working frequency of the electromagnetic wave in the resonant cavity; the metal connector is used for being connected with the medium transmission line in an inserting mode, and the resonant cavity and the resonant body transmit the microstrip line into an electromagnetic signal to be subjected to mode conversion, then penetrate through the circuit board and are coupled to the medium transmission line through the metal connector.
2. The dielectric transmission line coupler of claim 1, wherein the axis of the metallic connector coincides with the resonant cavity axis.
3. The dielectric transmission line coupler of claim 2, wherein the resonator body includes a plurality of resonant branches symmetrically disposed about a center of the resonant cavity, each resonant branch being disposed equidistant from a wall of the resonant cavity.
4. The dielectric transmission line coupler of claim 1, wherein the depth of the resonant cavity is equal to one quarter of a wavelength of a waveguide within the resonant cavity.
5. The dielectric transmission line coupler according to any one of claims 1 to 4, wherein the channel extends from the resonant cavity to an outer side of the metal base, and includes a first section and a second section connected to and communicated with the first section, the first section forms an inner opening on a cavity wall of the resonant cavity, the second section forms an outer opening on an outer side of the metal base, and a dimension of the second section perpendicular to an extending direction of the microstrip line is gradually increased from a connection point with the first section to the outer opening.
6. A dielectric transmission line coupler according to any one of claims 1 to 4, wherein the resonant body is a cross-shaped structure comprising four resonant branches, each resonant branch comprising a body and an extension at a free end of the body, the portion of the microstrip line located within the cavity being spaced from and opposite the free end of one of the resonant branches.
7. The dielectric transmission line coupler of claim 6, wherein the width of the extension of each resonance branch is equal to or greater than the maximum of the width dimension of the microstrip line and the width dimension of the main body.
8. The dielectric transmission line coupler of any one of claims 1 to 4, wherein the metallic connector has a hollow cylindrical shape including a transmission channel having a circular cross section, the resonant cavity has a circular cross section, and a diameter of the resonant cavity is equal to a diameter of the transmission channel, wherein the cross section is a plane taken perpendicular to an axial direction.
9. The dielectric transmission line coupler of claim 8, wherein the circuit board includes a dielectric layer and a conductive layer arranged in a stack, the surface being a surface of the dielectric layer facing away from the conductive layer;
the conductive layer is provided with a mounting hole coincident with the center of the resonant cavity, and the metal connector is inserted in the mounting hole and connected with the dielectric layer.
10. The dielectric transmission line coupler of claim 8, wherein the circuit board includes a dielectric layer, a conductive layer, and a substrate stacked in this order, the surface being a surface of the dielectric layer facing away from the conductive layer; and the substrate and the conducting layer are provided with mounting holes coincident with the centers of the resonant cavities, and one end of the metal connector is inserted into the mounting holes and connected with the dielectric layer.
11. The dielectric transmission line coupler of any one of claims 1 to 4, wherein the metal base includes a base body on which the resonant cavity is disposed and a base cover that covers a surface of the base body and encloses the resonant cavity.
12. The dielectric transmission line coupler of any one of claims 1 to 4, wherein the metal connector and the metal base are made of copper material.
13. A dielectric transmission line coupling assembly comprising a chip and the dielectric transmission line coupler of any one of claims 1 to 12, wherein the chip is mounted on the circuit board and spaced from the coupling portion, and the chip is electrically connected to the circuit board and the microstrip line.
14. A network device, comprising a cabinet, a dielectric transmission line and the dielectric transmission line coupler of any one of claims 1 to 12, wherein the cabinet comprises a server and a switch, the dielectric transmission line is plugged into a metal connector of the dielectric transmission line coupler, the dielectric transmission line coupler is plugged into a chip of the cabinet and electrically connected to the chip, and data transmission is performed between the server and the switch or/and between the cabinet and the cabinet through the dielectric transmission line.
15. The network device of claim 14, wherein the dielectric transmission line includes a tapered mating end for mating with an end of the metallic connector.
Technical Field
The present invention relates to the field of communication transmission technologies, and in particular, to a dielectric transmission line coupler, a dielectric transmission line coupling module, and a network device.
Background
At present, with the application of large-capacity network devices, the requirement on the transmission rate of interconnection between the devices is higher and higher. The requirement of high-speed interconnection can be met by using high-frequency-band (millimeter wave and terahertz) electromagnetic waves as carriers, and the performance of a high-frequency transmission line determines the communication rate between communication devices to a great extent. The polymer transmission line has the advantages of low loss, light weight, flexible application and the like, and as the carrier frequency is increased to millimeter wave and terahertz frequency bands, the transmission loss of the traditional copper wire and metal waveguide is increased sharply, so that the interconnection distance is limited and the channel performance is deteriorated; in contrast, how to apply the polymer transmission line in the high-speed interconnect module, coupling the modulated carrier signal output by the chip into the polymer transmission line is a key issue in such systems.
Disclosure of Invention
Embodiments of the present invention provide a dielectric transmission line coupler, where the dielectric transmission line coupler may couple a carrier signal output by a radio frequency chip to a dielectric transmission line, and transmit the carrier signal by using the dielectric transmission line, so as to reduce transmission loss between network devices.
The embodiment of the invention also provides a medium transmission line coupling component and network equipment.
On the one hand, the dielectric transmission line coupler comprises a circuit board, a microstrip line, a hollow metal connector and a coupling part, wherein the circuit board comprises an insulating surface, the coupling part comprises a metal base and a resonator body with a plurality of resonance points, the metal base is arranged on the surface, the metal base comprises a resonant cavity and a channel communicated with the resonant cavity and the outside of the metal base, the bottom wall of the resonant cavity is the surface of the circuit board, the resonator body is positioned in the resonant cavity and fixed on the surface, and the resonant body and the resonant cavity are of a central symmetrical structure and coincide at the center.
The microstrip line is arranged on the surface, the microstrip line linearly extends into the resonant cavity along the direction from the outside of the metal base to the center of the resonant cavity through the channel of the circuit board, the microstrip line and the resonant body which are positioned in the resonant cavity are arranged at intervals, the metal connector is arranged on one side of the circuit board, which is back to the surface of the circuit board, and the cutoff frequency of the metal connector is lower than the working frequency of electromagnetic waves in the resonant cavity, so as to ensure the transmission of signals; the metal connector is used for being connected with the medium transmission line in an inserting mode, and the resonant cavity and the resonant body enable the microstrip line to transmit electromagnetic signals to penetrate through the circuit board after mode conversion and are coupled to the medium transmission line through the metal connector.
In one embodiment, a microstrip line on the circuit board guides a high-frequency modulation signal in the radio frequency transceiver chip into a resonant cavity of the coupling portion, and a transmission mode (quasi-TEM mode) in the microstrip line is converted into a working mode in the resonant coupling structure through the resonant cavity and the resonator body. The dielectric transmission line coupler provided by the embodiment of the invention is used for coupling the electromagnetic signals transmitted by the network equipment into the dielectric transmission line, so that high-speed transmission is realized through the dielectric transmission line, the communication speed is ensured, and the transmission loss can be reduced. In addition, the dielectric transmission line coupler of the embodiment of the invention has a simple structure and is convenient to assemble, the resonance body and the resonance cavity are in central symmetry structures, and the centers of the resonance body and the resonance cavity are overlapped, so that the impedance matching of mode conversion is ensured.
Furthermore, the axis of the metal connector coincides with the axis of the resonant cavity, so that the coupling efficiency can be ensured.
Furthermore, the depth of the resonant cavity is equal to one quarter of the wavelength of the waveguide in the resonant cavity, so that better bandwidth is realized, and reflection is small.
In one embodiment, the metal connector is in a hollow cylinder shape and comprises a transmission channel with a circular section, and the transmission channel is used for inserting a medium transmission line with a circular section, so that the matching degree is improved, and the inserting precision is ensured; the cross section of the resonant cavity is circular, and the diameter of the resonant cavity is equal to that of the transmission channel, so that the transmission efficiency of a signal from the resonant cavity to the metal connector to the medium transmission line is ensured, and the insertion loss is reduced. Wherein the cross-section is a plane taken perpendicular to the axial direction. The resonator body is a sheet body with a centrosymmetric structure and is attached to the bottom wall of the resonant cavity. The resonator body is provided with a plurality of resonance points to increase the bandwidth width. The metal base is a rectangular metal block, and the resonant cavity is a cylindrical cavity formed in the metal base. The microstrip line is a strip-shaped metal sheet, the characteristic of ensuring the bandwidth of the resonant cavity is arranged at an interval with the resonance body, and the microstrip line is used for conducting the modulated signal of the radio frequency transceiver chip to the coupling part, converting the transmission mode in the microstrip line into the working mode of the coupling part through the resonance body and the resonant cavity of the coupling part arranged on the circuit board, converting the transmission mode into the transmission mode of the metal connector and coupling the transmission mode to the medium transmission line through the metal connector. The matching of the resonance body and the resonance cavity can couple high-frequency electromagnetic signals in the radio frequency transceiving chip to the dielectric transmission line, so that the communication equipment can be interconnected.
In one embodiment, the resonant body comprises a plurality of resonant branches symmetrically arranged around the center of the resonant cavity, and a plurality of resonant points are generated by the plurality of resonant branches; each branch is arranged at equal interval with the cavity wall of the resonant cavity so as to ensure the performance of the mode conversion structure, namely, the bandwidth width is ensured, and the insertion loss and reflection are reduced.
In this embodiment, the resonator is a cross structure, that is, a cross-shaped sheet body, and includes four resonance branches, each resonance branch includes a main body and an extension section located at a free end of the main body, and a portion of the microstrip line located in the resonant cavity is opposite to a free end of one of the resonance branches at an interval, so as to reduce the reflection condition of the resonant cavity. Each main part is the rectangle lamellar body, the extension section is that the minor face of rectangle lamellar body extends certain width and extends the formation to main part width direction simultaneously.
Furthermore, the width of the extension section of each resonance branch is greater than or equal to the maximum value of the width of the microstrip line and the width of the main body, so that the impedance matching and insertion loss of the resonance body is small.
In an embodiment, the channel extends from the resonant cavity to an outer side direction of the metal base, and includes a first section and a second section connected and communicated with the first section, the first section forms an inner opening on a cavity wall of the resonant cavity, the second section forms an outer opening on an outer side of the metal base, and a dimension of the second section perpendicular to an extending direction of the microstrip line is gradually increased from a connection position of the second section and the first section to the direction of the outer opening, so that impedance matching of the microstrip line at the feed end can be ensured. The metal base is a rectangular metal block, and the channel penetrates through one outer side surface of the metal base and is communicated with the resonant cavity. The microstrip line penetrates through the channel and extends into the resonant cavity, and is not in contact with the channel wall of the channel, so that the transmission performance is ensured. In other embodiments, the channels extend in a straight line and have equal dimensions perpendicular to the extension direction of the microstrip line.
In one embodiment, the circuit board comprises a dielectric layer and a conductive layer which are stacked, and the surface is the surface of the dielectric layer opposite to the conductive layer; the conductive layer is provided with a mounting hole coincident with the center of the resonant cavity, and the metal connector is inserted in the mounting hole and connected with the dielectric layer. The metal connector is prevented from contacting with the conductive layer, so that the boundary conditions of the metal base and the metal connector are guaranteed, the electric field performance inside the metal connector is further guaranteed, and the coupling performance of the coupler is guaranteed.
In another embodiment, the circuit board comprises a dielectric layer, a conductive layer and a substrate which are sequentially stacked, wherein the surface is the surface of the dielectric layer opposite to the conductive layer; and the substrate and the conducting layer are provided with mounting holes coincident with the centers of the resonant cavities, and one end of the metal connector is inserted into the mounting holes and connected with the dielectric layer.
In one embodiment, the metal base comprises a base body and a base cover plate, the resonant cavity is arranged on the base body, and the base cover plate covers the surface of the base body and encapsulates the resonant cavity with the circuit board. The metal base may also be integrally formed. This embodiment adopts apron and base body, the counterpoint and the equipment of metal base and resonance body and microstrip line of being convenient for.
In one embodiment, the metal connector and the metal base are made of copper material.
The dielectric transmission line coupling assembly provided by the embodiment of the invention comprises a chip and the dielectric transmission line coupler, wherein the chip is arranged on the circuit board and is arranged at intervals with the coupling part, and the chip is electrically connected with the circuit board and the microstrip line. In one embodiment, the chip is a radio frequency transceiver chip. After receiving the signals of the network equipment, the chip transmits the signals to the resonant cavity through the microstrip line, the resonant cavity is subjected to transmission mode conversion, and then the signals are transmitted by adopting the dielectric transmission line, so that the transmission loss is reduced, and the transmission efficiency can be ensured.
The network equipment provided by the embodiment of the invention comprises a cabinet, a medium transmission line and the medium transmission line coupler, wherein the cabinet comprises a server and a switch, the medium transmission line is inserted into a metal connecting head of the medium transmission line coupler, the medium transmission line coupler is electrically connected with a chip of the cabinet, and data transmission is carried out between the server and the switch or/and between the cabinet and the cabinet through the medium transmission line. In particular, data transmission between cabinets generally refers to interconnection of a top cabinet switch and an aggregation switch. The chip is a high-speed radio frequency chip or a transceiver chip, the medium transmission line coupler is connected with the transceiver chip or the high-speed radio frequency chip in the cabinet, and the transceiver module is connected with the switch of the cabinet or the server in an inserting and electric mode.
Furthermore, the medium transmission line comprises a plug end, wherein the plug end is conical and is used for being plugged with the end part of the metal connector. The metal connector comprises a cavity with a circular section, the cavity is connected with the inserting end in an inserting mode, the inserting stability is guaranteed, impedance matching in a broadband range is achieved, and low-insertion-loss and small-reflection coupling in the broadband range is achieved.
The dielectric transmission line coupler can transmit high-frequency electromagnetic wave signals through the dielectric transmission line, can ensure the communication speed between devices, reduces the transmission loss and meets the requirement of high-speed interconnection.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of a dielectric transmission line coupler according to the present invention;
fig. 2 is a schematic view of a partial structure of the dielectric transmission line coupler shown in fig. 1;
FIG. 3 is a schematic cross-sectional view of one version of the circuit board of the dielectric transmission line coupler of FIG. 1 taken along the direction of the axis of the metallic connector;
FIG. 4 is a simulation diagram of the S-parameters of the dielectric transmission line coupler shown in FIG. 3;
fig. 5 is a schematic cross-sectional view of another mode of the circuit board of the dielectric transmission line coupler shown in fig. 1 along the axial direction of the metal joint head;
FIG. 6 is a simulation diagram of the S-parameters of the dielectric transmission line coupler shown in FIG. 5;
FIG. 7 is a schematic diagram of the structure of a dielectric transmission line coupler assembly provided by the present invention;
FIG. 8 is a diagram of a network device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a coupler for a medium transmission line, and referring to fig. 1 and fig. 2, fig. 1 is a schematic perspective structure diagram of the coupler for a medium transmission line provided by the embodiment of the present invention, and fig. 2 is a schematic partial structure diagram of the coupler for a medium transmission line shown in fig. 1. The dielectric
The
In one embodiment, the
The dielectric transmission line coupler provided by the embodiment of the invention is used for coupling the electromagnetic signals transmitted by the network equipment into the dielectric transmission line, so that high-speed transmission is realized through the dielectric transmission line, the communication speed is ensured, and the transmission loss can be reduced. Moreover, the dielectric transmission line coupler of the embodiment of the invention has a simple structure and is convenient to assemble, and the
As shown in fig. 3, the
Referring to fig. 2, in an embodiment, the
In an embodiment, the
In one embodiment, as shown in fig. 2, the
Specifically, the
Referring to fig. 4, in other embodiments, the
Further, the width of the extension 333 of each
Referring to fig. 1 and 3 together, fig. 3 is a cross-sectional view of the dielectric transmission line coupler shown in fig. 1 along an axial direction, and an axis of the
Referring to fig. 3, in an embodiment, the
For explanation and simulation by taking a specific structure and data as an example in the present embodiment, the
Referring to fig. 5, in another embodiment, the
In this example, the relative dielectric constant of the base layer and the base layer was 2.65, and the thickness was 0.1788 mm; the
In the electromagnetic simulation software, modeling is performed according to the structural size given in the above description of the simulation data, and by feeding power at the port of the microstrip line, the S-parameter of the coupler in the D-band can be obtained, as shown in fig. 6. As can be seen from the calculation results, the reflection parameter S11 is less than-15 dB and the transmission parameter S21 is greater than-3.1 dB in the frequency band range of 110-160 GHz. This shows that the coupling scheme of the present invention has device performance with large bandwidth, low insertion loss and low reflection. Because the resonant body and the microstrip line with multiple resonant branches are introduced into the metal resonant cavity, a plurality of resonant points are introduced into the dielectric transmission line coupler, and the working bandwidth of the dielectric transmission line coupler is widened. Meanwhile, the resonant cavity and the resonant body form a quarter-wavelength resonance condition, and high-efficiency mode conversion between the electromagnetic wave microstrip line and the metal connector can be realized. High-efficiency coupling of the dielectric transmission line coupler to the dielectric transmission line can be realized. It should be noted that the numbers used in the simulation of the above two embodiments are only one using the dielectric transmission line coupler of the present application, and the two embodiments are not limited to these embodiments in the case where the above effects can be achieved.
Referring to fig. 7, an embodiment of the present invention provides a dielectric transmission line coupling assembly 200, which includes a chip 210 and the dielectric
Referring to fig. 8, an embodiment of the present invention provides a network device, including a cabinet 300, a
In this embodiment, the two ends of the
Further, the
The dielectric transmission line coupler can transmit high-frequency electromagnetic wave signals through the dielectric transmission line, can ensure the communication speed between devices, reduces the transmission loss and meets the requirement of high-speed interconnection.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
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